My skins was stalling normal, and the have the rainmeter's symbols, now ther change the icon (picture) and when i will install apeare this messenge:
"rainmeter.ini can't be saved. Configurations will be lost. Be sure that the archive don't are marked was only lecture..."
How can i fix it?

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This feels like something has changed on your system, that has altered the "association" for the .rmskin format, or perhaps your SkinInstaller.exe has become corrupted. The fact that the icon used for a .rmskin file has changed from the SkinInstaller.exe icon to the generic "some program" icon is a hint. I would try re-installing the latest beta or release version of Rainmeter from https://www.rainmeter.net.

If that fixes it, I would be very tempted to immediately run your antivirus and MalwareBytes on your machine.